White smoke and rough idle 1hdt

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voksboy

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So a few weeks ago I filled up my 1hdt and after 100 kilometers or so I started experiencing rough idle. Thing is though after purging it would get better. Figured the problem to be fuel.

Fast forward. I've changed the fuel fiter a day before draining the fuel. After that I changed the intake gaskets (looked like I had an air leak) also replaced fuel rail copper washers. I've stuck a few injector cleaners in my tank.

I have white smoke and rough idle. I was thinking is could be blow by but funny thing is its an Intermit problem. I don't seem to have a lose of power. I do have black smoke a lot more than usual.

Sometimes my engine is super smooth but a lot of times it shakes heavily. More so without AC.

I'm lost already. Like for instance today it's rough. Then Tom for a good 2 hours it's super smooth then rough again. If it where something like piston rings or valve guides, wouldn't it always be rough?

I'm thinking my injectors are bad? Or pump? Anyone go though something like this?
 
How many klms has the engine done and how long since the pump was looked a last?

I doubt it is injectors or an engine compression problem ,because as you guessed,these would be constant.

I dont think its air because once you are up to highway speed ,it takes a hell of big leak to upset the engine.

I would check the fuel pick up in the tank ,it may have a big chunk of crud wrapped around it.This can cause intermittant problems as it frees itself and then gets sucked back on.

I would also check for air leaks,but after that it only leaves the pump.
Its not unusual for them to need major work after 300000klms
 
Run a clear hose from fuel filter to IP, bubbles indicate air. This is simple and visual.
I have kept the clear hose on and have a spare tied up just in case.

Or disconnect line from fuel filter and feed the IP directly via gravity, if this works then you have an issue back towards the fuel tank. If the problem persists from the gravity feed then the problem moves towards the IP then engine.
 
My engine only has 130k on it. I only have rough idle, once I press the gas it's okay. Except I do see white smoke but power is good.

It really could be in the tank? I'll check that next week. Thing about here, our diesel sucks. It's just
So strange that it's a intermittent prob. Could be crappy for 2 days then the next day it's all good.
 
If the fuel sucks then add an industrial type fuel filter with a large clear bowl and drain, again this provides instant visual clues.

White smoke with a warm engine is generally caused by water and or raw unburnt fuel. Since your problem is intermittent I would clear up the fuel issue as this is cheap and easy.

Worst case: Injectors,timing, head gasket compression....

You could try some diesel additives.
 
What I mean about fuel sucks is you need to watch where you get fuel. Sometimes it's not the best. All my friends cruisers have a bit of white smoke on start up.

I'll try the clear hoses ASAP. If it's compression, can't it cause intermittent rough idle?
 
Some owners have had rough idle when the vehicle is parked with the nose pointing uphill.One of the forum members here fixed his by replacing the springs on the governor.

All diesels make some white smoke on start up.This is to do with condensation,the colder it is the worse it is.
 
You really need to do some of the things outlined in the previous posts. It looks like any other diesel shaking and putting out white smoke.
 
Well bad news and still can't believe it.

I have 131k kilometers on the clock. Second owner and serviced regularly.

Had it checked with someone who knows this engine more than me. He is sure it's the piston rings.

If you pull the dipstick out, there is smoke. same goes when you pull the breather hose.

What I don't understand is the symptoms. The car can run rough idle but can also run very smooth like in the videos. I would have thought if it was rings it would be always rough. It doesn't eat oil or water. Turbo is wet with oil however exhaust side is dry. Car's oil pressure is perfectly fine. power is good and can run hours no problem. Never stalls nothing. In fact it seems like if anything it's better than a few weeks ago.

He said piston/piston rings will carbon up and thats why it's intermittent. Very new to me.

Anyone else want to chime in? I was using 15/40 castrol for oil and recently stuck 40 SAE. Wondering if an additive will fix the leak? According to this guy, this has happend to 3 local land cruisers. it only happens to the 1hdt 100 series 12 valve manual because of the low gear ratio.
 
voksboy said:
Well bad news and still can't believe it.

I have 131k kilometers on the clock. Second owner and serviced regularly.

Had it checked with someone who knows this engine more than me. He is sure it's the piston rings.

If you pull the dipstick out, there is smoke. same goes when you pull the breather hose.

What I don't understand is the symptoms. The car can run rough idle but can also run very smooth like in the videos. I would have thought if it was rings it would be always rough. It doesn't eat oil or water. Turbo is wet with oil however exhaust side is dry. Car's oil pressure is perfectly fine. power is good and can run hours no problem. Never stalls nothing. In fact it seems like if anything it's better than a few weeks ago.

He said piston/piston rings will carbon up and thats why it's intermittent. Very new to me.

Anyone else want to chime in? I was using 15/40 castrol for oil and recently stuck 40 SAE. Wondering if an additive will fix the leak? According to this guy, this has happend to 3 local land cruisers.it only happens to the 1hdt 100 series 12 valve manual because of the low gear ratio.
Click to expand...

I would be getting some more opinions.. They still run smooth with worn rings but blow copious amounts of blue smoke under load.
Some pressure from the crankcase is normal for a diesel. Im almost 100% sure it will be a fuel problem.
Like you said ,the problem is intermittant. Worn engine internals dont go away and return.
Is this mechanic putting himself forward to rebuild the engine?

.it only happens to the 1hdt 100 series 12 valve manual because of the low gear ratio.
Click to expand...
I know you are repeating what he said but it sounds like nonsense to me

It really needs a good fuel injection shop.
 
Another owner on this forum has had similar problems and has traced them to fuel bought at a local outlet.
Maybe you could try fuel from a busy outlet ,like one on a main highway where large trucks refuel.
I dont know about your area,but generally BP sell the best diesel in oz.
 
That's what I'm trying to figure out or understand. I don't understand why it would get better at times and sometimes long. I personally think its something to do with fuel. It started after that tank a month back. I'm sure I could have a bit of blow by but I'm not eating oil nor any water. All the gauges say it's okay, pressure, egt's etc.

I've given it to another friend to look at. He plans to put thicker oil/additive and have the injectors checked. Let's see what happens next.

Thanks for all the help everyone. I'm truly stomped but I'll try everything mentioned here.

Regarding fuel, other than that time it started I've used from only 2 main fuel stations.
 
You really need a fuel injection expert who has acutal experience on these fuel pumps and injectors
There are too may on here who took theirs to a friend/aquaintance/corner shop only to have to have pay again for it to be done correctly.
The injectors are dual stage and very few shops have the abilty to rebuild and adjust them.

You have the correct oil for your climate.
 
Checked the injectors and had it tested and they are okay. Tried every additive. My idle is still the same, Rough but sometimes all okay.

Another mech saying it's the piston rings and can't explain the idle. Thinking carbon build up but can't explain.
 
Have either of the mechanics telling you it's piston rings done a compression test?
 
So I finally found a compression tester and I failed cylinder 5 and 6.

So I opened my engine. I learned that the old mech who did my engine (before I got it) was simply an idiot. There was one bolt that broke off. I learned he removed the cylinder head before and 2 bolts had rust spots (prob left out in the rain). Then I see the timing completely off! Instead of the gear timed to TDC which is in 9 o'clock position he timed it to the 12 o'clock position!

At the end of everything. I'm having my head done, pistons rings changed.

The good thing, after all of this my LC should gain a lot of power. How it ran smooth for all this time really baffles me.
 
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